Drying tube



Aug. 5. 1924. 1,503,823

W. F. FINKL DRYING TUBE- Original Filed June 16. 1919 Patented Aug. 5, 1924.

WILLIAM F. rIuKL, or CHICAGO, ILLINOIS.

DR N TUBE.

Original application filed June 16, 1919, Serial No. 304,466. Divided and this application filed May 20,

To all whom it may concern.

Be it known that 1, WILLIAM F. FINKL, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Drying Tubes, of which the following is a specification.

This invention relates to an apparatus for determining the amount of carbon in ferrous metal and more particularly to drying tubes to be used with apparatus of this class, and has for its object to provide a new and improved form of drying tube.

The invention is illustrated in the accompanying drawings, wherein Fig. 1 is a View of one form of apparatus in whichthe improved form of tube may be used;

Fig. 2 is a sectional View of the drying tube.

Like numerals refer to throughout the several figures.

This-application is a division of my application Serial Number 354,466, filed June 16th, 1919.

In order to illustrate the purpose and use to which my invention is applied, I have shown a typical carbon testing apparatus including a suitable source of oxygen such as the oxygen tank 1, and a mercury gauge 2, a pressure reducing valve 3, a dryer purifier jar 4, and a fused silica combustion tube 5, passing through a combustion furnace 6.

A suitable combustion boat or receptacle 6 is placed in the tube 5, as shown, and the sample of ferrous metal such as steel or iron to be tested is placed in this boat.

A three way cock 7 is placed in the stopper at the exit end of the tube 5. This enables like parts ing the gas through the purifying tubes and absorption bulb. The train may also con tain a tube 8 containing mesh zinc which takes care of any of the sulphur gases evolved by the combustion.

Referring now particularly to the subject matter of my invention, it will be seen that, the train also contains a drying tube 9 filled with phosphoric anhydride. This drying tube is provided at the top with an upper stopper 1O packed with asbestos to prevent fine particles of the anhydride from passing over into the absorption bulb. As the anhydride liquifies it drops down through the glass wool into the lower stopper 11. This in Fig. 1.

the operator to flush the train without pass.-;

Serial No. 471,298.

in the boat 6 and the boat is then placed in the combustion zone of the furnace as shown The sample of ferrous metal is burned in the presence of oxygen. The carbon of this sample is then converted into carbon dioxide which is forced through the drying tube 9, and thence through the absorption bulb 12 where it is absorbed by the absorbent material therein. The absorption bulb is then weighed in the usual manner to ascertain its gain in weight and this gain.

represents the amount by weight of carbon dioxide produced by the burning of the sample.

It will be noted that the drying tube 9 is open at both ends and that it has an upper closure or stopper 10 which fits into the body portion, and that it has a lower closure or stopper 11 which is hollow and into which fits the end of the body portion so that the material in the drying tube is prevented from getting between the engaging faces of the tube and the stopper. It will further be noted that there is a laterally projecting part 9 at the top of the body portion and integral therewith which is hollow and which communicates with the body portion, and that there is also a laterally projecting part 9 near the bottom of the body portion which is hollow and which communicates therewith. The hollow of both laterally projecting parts form passageways by means of which communication may be had between the body portion 9 and the atmosphere or other devices. The laterally projecting portion 9 is opposite the stopper 10, and the stopper has a passageway or opening 1O therethrough. When the stopper is turned to bring the opening 10 opposite the laterally projecting part 9*, said tubular portion communicates with the body portion of the drying tube, and when the stopper is turned to another position, the laterally projecting part 9 is closed so as to shut ofi-the communication between it and the body portion,;

and thus shut off the passage of material through the drying tube.

I claim:

1. A drying tube having a body portion, an upper stopper-therefor, a lower removable stopper therefor forming a base for said tube, the lower end of the drying tube projecting into the interior of said lower stopper so that the lower stopper engages the outer face of the drying-tube, whereby the.-

material in the drying tube is prevented from gettin between the engaging facesof the tube an stopper.

7 2. A drying tube having abody portion open at boththe top and the: bottom, two closures one at the top and the other at the bottom, the lower-olosure fitting onthe outside of the body portion, whereby the mate rial in; thedryingtube is prevented from getting between the engagingfaces of the and an outletio'r said body portion, both above said lower closure said top, closure acting as apontroLvalVe togcont-rolj the; passage of materialthrough the body portion.

4. A dryingtube having a body portion and open at the top and the bottom, a stopper at the top which fits into the body portion, a hollow tubular portion integral with said body portion at thetop, a hollowtubu= lar portion integral with said body portion near the bottom thereof, and a hollow stopper for the bottom intowhich theendofthebodyportion fits and which engages the outer faceiofthe body portion so-thatathe material in the: body portion is ,prevented' from getting between the engaging facesof the bodyportion and the stopper.

5. A drying. tube having a body portion open atboth. the top -and q the 5 bottom, two

closures, oneatthetop and the. other at the bottom, the lower closure forming the base. of said tube.andfittingon the outside of the body portion, wherebythematerial. in the: drying tube. is prevented fr om getting between the.- engaging. faces of; the body ,por

tion and the closure sa dtube provided-with two laterally projecting; portions having passageways therethrou-gh,- the; lower; por-;' tion being located' above the bottornclosure' and the other near theiotherend, oneof; said closures adapted to control one of said pasf sagewaye- Signed at Chicago, State of Illinois-,this 18th day ofiMam-wl92l.

- VV'ILLIAll B F;

county of Cook, and 

